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/*
* Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "FrameLoader.h"
#include <wtf/CheckedPtr.h>
namespace WebCore {
class HistoryItem;
class HistoryItemClient;
class LocalFrame;
class SerializedScriptValue;
enum class ShouldTreatAsContinuingLoad : uint8_t;
struct StringWithDirection;
class HistoryController : public CanMakeCheckedPtr {
WTF_MAKE_NONCOPYABLE(HistoryController);
WTF_MAKE_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(Loader);
public:
enum HistoryUpdateType { UpdateAll, UpdateAllExceptBackForwardList };
explicit HistoryController(LocalFrame&);
~HistoryController();
WEBCORE_EXPORT void saveScrollPositionAndViewStateToItem(HistoryItem*);
void clearScrollPositionAndViewState();
WEBCORE_EXPORT void restoreScrollPositionAndViewState();
void updateBackForwardListForFragmentScroll();
void saveDocumentState();
WEBCORE_EXPORT void saveDocumentAndScrollState();
void restoreDocumentState();
void invalidateCurrentItemCachedPage();
void updateForBackForwardNavigation();
void updateForReload();
void updateForStandardLoad(HistoryUpdateType updateType = UpdateAll);
void updateForRedirectWithLockedBackForwardList();
void updateForClientRedirect();
void updateForCommit();
void updateForSameDocumentNavigation();
void updateForFrameLoadCompleted();
HistoryItem* currentItem() const { return m_currentItem.get(); }
RefPtr<HistoryItem> protectedCurrentItem() const;
WEBCORE_EXPORT void setCurrentItem(Ref<HistoryItem>&&);
bool currentItemShouldBeReplaced() const;
WEBCORE_EXPORT void replaceCurrentItem(RefPtr<HistoryItem>&&);
HistoryItem* previousItem() const { return m_previousItem.get(); }
RefPtr<HistoryItem> protectedPreviousItem() const;
void clearPreviousItem();
HistoryItem* provisionalItem() const { return m_provisionalItem.get(); }
RefPtr<HistoryItem> protectedProvisionalItem() const;
void setProvisionalItem(RefPtr<HistoryItem>&&);
void pushState(RefPtr<SerializedScriptValue>&&, const String& url);
void replaceState(RefPtr<SerializedScriptValue>&&, const String& url);
void setDefersLoading(bool);
private:
friend class Page;
bool shouldStopLoadingForHistoryItem(HistoryItem&) const;
void goToItem(HistoryItem&, FrameLoadType, ShouldTreatAsContinuingLoad);
void initializeItem(HistoryItem&);
Ref<HistoryItem> createItem(HistoryItemClient&);
Ref<HistoryItem> createItemTree(HistoryItemClient&, LocalFrame& targetFrame, bool clipAtTarget);
void recursiveSetProvisionalItem(HistoryItem&, HistoryItem*);
void recursiveGoToItem(HistoryItem&, HistoryItem*, FrameLoadType, ShouldTreatAsContinuingLoad);
bool isReplaceLoadTypeWithProvisionalItem(FrameLoadType);
bool isReloadTypeWithProvisionalItem(FrameLoadType);
void recursiveUpdateForCommit();
void recursiveUpdateForSameDocumentNavigation();
bool itemsAreClones(HistoryItem&, HistoryItem*) const;
bool currentFramesMatchItem(HistoryItem&) const;
void updateBackForwardListClippedAtTarget(bool doClip);
void updateCurrentItem();
Ref<LocalFrame> protectedFrame() const;
WeakRef<LocalFrame> m_frame;
RefPtr<HistoryItem> m_currentItem;
RefPtr<HistoryItem> m_previousItem;
RefPtr<HistoryItem> m_provisionalItem;
bool m_frameLoadComplete;
bool m_defersLoading;
RefPtr<HistoryItem> m_deferredItem;
FrameLoadType m_deferredFrameLoadType;
};
} // namespace WebCore
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